Stony is what I consider "Easy" "Expert" singletrack .
Easy because like you said, you can carry speed and roll / coast up many of the hills. That's how much of the single track was designed and correctly got named "Rollercoaster".
Bloomer has many short steep climbs that will tax the lungs.
Stony doesn't have enough clay to support those steep climbs.
Bloomer doesn't have the volume of traffic like Stony to erode those steep climbs.
Stony gets it's reputation because of the average rider who gets his first taste of rolling singletrack. It's a good stepping-stone for the next level to some, the end all for many others.
All the passionate replies supporting Stony are from riders who enjoy all the trails around here but many consider Stony "home base"....
That's why the MFO got started. (That's a whole other thread......)